" zaniness "

1: lack of good sense or judgment;

  * e.g., " ... what zaniness possessed you to take a mental health day when you knew that the head honcho would be visiting? "

•  Synonyms : 

•  absurdity,

•  asininity,

•  balminess,

•  brainlessness,

•  craziness,

•  daftness,

•  dippiness,

•  dottiness,

•  fatuity,

•  fatuousness,

•  folly,

•  foolishness,

•  imbecility,

•  inanity,

•  insanity,

•  lunacy,

•  madness,

•  nonsensicalness,

•  nuttiness,

•  preposterousness,

•  senselessness,

•  silliness,

•  simplicity,

•  unwisdom,

•  wackiness,

•  witlessness

•  Antonyms : 

•  prudence,

•  sagaciousness,

•  sagacity,

•  sageness,

•  sanity,

•  sapience,

•  sensibleness,

•  soundness,

•  wisdom

1: showing or marked by a lack of good sense or judgment;

  * e.g., " ... a zany plan to drive cross-country on a motorized scooter "

•  Synonyms : 

•  absurd,

•  asinine,

•  balmy,

•  barmy,

•  batty,

•  brainless,

•  bubbleheaded,

•  cockeyed,

•  crackbrained,

•  crackpot,

•  crazy,

•  cuckoo,

•  daffy,

•  daft,

•  dippy,

•  dotty,

•  fatuous,

•  featherheaded,

•  fool,

•  foolish,

•  fruity,

•  gaga,

•  half-baked,

•  half-witted,

•  harebrained,

•  inept,

•  insane,

•  jerky,

•  kooky,

•  loony,

•  loony tunes,

•  lunatic,

•  lunkheaded,

•  mad,

•  meshuga,

•  nonsensical,

•  nutty,

•  preposterous,

•  sappy,

•  screwball,

•  senseless,

•  silly,

•  simpleminded,

•  stupid,

•  tomfool,

•  unwise,

•  wacko,

•  wacky,

•  weak-minded,

•  witless

•  Antonyms : 

•  judicious,

•  prudent,

•  sagacious,

•  sage,

•  sane,

•  sapient,

•  sensible,

•  sound,

•  wise